PA Double Framing Mats let you turn your photos and artwork into dramatic and exciting home decor pieces that can be hung on your walls, displayed on an easel, or even decoratively framed. Double layer mat with both layers having beveled edges. 8"x 10" /4"x 6" Black Core Black/Black- Sizes indicate exterior dimension and photo or art size, with inside edge overlapping some of image. Actual inside measurements approximately 3.5"x 5.5". Black outer surface with black inner mat, both with black core bevels. Acid free but for Non-Conservation Framing.